SSH errors - Operation not permitted when attempting to ssh into another unraid server.

[xxnumbxx]

I have two servers one running 6.9.2 and my backup server is on 6.10-rc7. When attempting to connect from the backup server to my primary, I get the below error. When doing the inverse everything works correctly and no errors reported. I have tried deleting the .ssh folder from the flash/configs and recreating the connection but the problem persists. Also tried resetting permissions, still a no go. Any idea what causes this?

It does seem to allow the connection I just don't like errors. Thanks in advance for any help.

 

root@XXXXXX:~# ssh 10.10.1.2
Enter passphrase for key '/root/.ssh/id_ed25519': 
hostfile_replace_entries: link /root/.ssh/known_hosts to /root/.ssh/known_hosts.old: Operation not permitted
update_known_hosts: hostfile_replace_entries failed for /root/.ssh/known_hosts: Operation not permitted

 

Edited May 10, 2022 by xxnumbxx
spelling

[xxnumbxx]

Any ideas?

[JorgeB]

I think I remember seeing the same thing when connecting from a server running an older release, but since it still worked didn't though much about it, it should go away once you update the backup server.

[JorgeB]

Turns out this can also occur between two servers running v6.10-rc, so lets see if someone has an idea on what's causing this, or you can create a bug report.

[jmztaylor]

In the interim it might be possible to bypass that if you are confident of no man in the middle attacks and bypass the host key check using:

ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null  

Not sure if it will work in this exact scenario.

[Stromol]

I have this same problem since updating to 6.10.2. I have two unraid servers both on 6.10.2  If I SSH in from one to the other I get the error "hostfile_replace_entries: link /root/.ssh/known_hosts to /root/.ssh/known_hosts.old: Operation not permitted
update_known_hosts: hostfile_replace_entries failed for /root/.ssh/known_hosts: Operation not permitted". It does proceed to log me in though. I tried clearing the known host file and it did then update the file despite the message. The other oddity is it only does it in one direction. If I SSH in form the other server it works fine. I can see no difference between the file permissions. The only other difference I can think of is that on one server I updated regularly through the 6.10 beta releases and on the other I went from 6.9 straigh to the stable release of 6,10. I see that this was reported with OpenSSH  but it was patched some while ago

 

[zer0.de]

Hi,
first Post and an than a solution

if any one have this error like me:
 

update_known_hosts: hostfile_replace_entries failed for /root/.ssh/known_hosts: Operation not permitted

 

I found this work for me:

 

ssh-keyscan -H TARGET_HOST >> ~/.ssh/known_hosts

 

on both systems and the error is gone.

 

[JorgeB]

27 minutes ago, zer0.de said:

I found this work for me:

Thanks, also worked for me.

[Stromol]

Thank you. It worked for me!

[tmchow]

On 6/5/2022 at 4:37 AM, zer0.de said:

Hi,
first Post and an than a solution

if any one have this error like me:
 

update_known_hosts: hostfile_replace_entries failed for /root/.ssh/known_hosts: Operation not permitted

 

I found this work for me:

 

ssh-keyscan -H TARGET_HOST >> ~/.ssh/known_hosts

 

on both systems and the error is gone.

 

I was having this error when SSH'ing into a non-unraid box too.  This `ssh-keyscan` command also resolved the issue for me. Thanks!

[Bd2e]

On 6/5/2022 at 12:37 PM, zer0.de said:

 

ssh-keyscan -H TARGET_HOST >> ~/.ssh/known_hosts

 

Worked for me too 6.10.3 so thank you.

 

 

[tmchow]

On 6/5/2022 at 4:37 AM, zer0.de said:

I found this work for me:

 

ssh-keyscan -H TARGET_HOST >> ~/.ssh/known_hosts

 

on both systems and the error is gone.

 

Thank you! this worked for me too.

[adminmat]

I'm SSHing to a remote Raspian OS server over Wireguard. I'm getting theses same errors when Rsync'ing to the remote server. 

 

Do I need to replace any of the command test?

 

I tried this command replacing the TARGET_HOST part with the SSH address of my other server. i.e. [email protected] but I get this output in unRAID's CLI:

getaddrinfo [email protected]: Name or service not known
getaddrinfo [email protected]: Name or service not known
getaddrinfo [email protected]: Name or service not known
getaddrinfo [email protected]: Name or service not known
getaddrinfo [email protected]: Name or service not known

 

Any ideas? 

 

Edited January 8, 2023 by adminmat

[JorgeB]

6 hours ago, adminmat said:

Any ideas? 

Use only the target IP address.

[adminmat]

Ok I had to first delete the contents from the /root/.ssh/known_keyhosts file. Then after running the command above I'm no longer getting the errors. Thanks.

 

 

[Vatoe]

Still helping to this date with the fix!

On 6/5/2022 at 9:37 PM, zer0.de said:

Hi,
first Post and an than a solution

if any one have this error like me:
 

update_known_hosts: hostfile_replace_entries failed for /root/.ssh/known_hosts: Operation not permitted

 

I found this work for me:

 

ssh-keyscan -H TARGET_HOST >> ~/.ssh/known_hosts

 

on both systems and the error is gone.

 

Still helping to this day. Thanks!

[boernie77]

Hi,

 

i also have this error. 

 

I run the ssh-keygen on the firs server without problems. But my second server has not the standard port. I tried 

 

ssh-keyscan -H 192.168.2.120:2001 >> ~/.ssh/known_hosts

 

but this doesn´t work.

 

How can i run ssh-keyscan with a server on an other port?

 

Thanks!

[Zack3000]

In my case, the command also didn't solve the issue. A look into the known_hosts file revealed that the IP (not the port) was written in square brackets. After I removed those, it worked.